Who knows, maybe the Thalmor aren't as bad as we think. Perhaps they're better for Tamriel as a whole and we've just been too busy seeing everything from the eyes of sore losers who can't handle anything that scratches their pride.

I mean, they have a point. Why would you worship Talos, thought to be Lorkhan incarnate? He started the cycle of life and death, and thus is responsible for all of the trauma mortals endure. Not to mention he wasn't very considerate to trick the Aedra like he did. He honestly is a conniving piece of work, and the Altmer seem pretty justified in banning the worship of Lorkhan and his various incarnations.

Personally I like the idea of doing a whole region like maybe the Elven nations of Valenwood and Summerset Isle.

Or maybe Hammerfell and High Rock since they got pretty shotty appearances in Daggerfall.

Tarvaax:

I mean, they have a point. Why would you worship Talos, thought to be Lorkhan incarnate? He started the cycle of life and death, and thus is responsible for all of the trauma mortals endure. Not to mention he wasn't very considerate to trick the Aedra like he did. He honestly is a conniving piece of work, and the Altmer seem pretty justified in banning the worship of Lorkhan and his various incarnations.

The Thalmor didn't ban Talos for any of those reasons. To be frank they didn't ban Talos for his possible Lorkhan connections at all.

They believe that they are the descendants of the Aedra that created the world. Litteral gods. The running idea is that when the Aedra created the world many of them had to give up their power and become "less" (there is evidence that the elder scrolls may be some of these fallen Aedra)

The Thalmor believe themselves to be descendants of those guys. They think that worship of Talos is "keeping them mortal".

Moreover the Nords might have the right idea with their reverence of Shor (basically Lorkhan with a different name) because they see him as the bringer of life to the world.

The debate then is whether you think that Nirn itself deserves to exist.

I'm pretty sure they banned Talos partly because he was a human whose worshiped as a god.

Well, that's part of it, but it's really that they're trying to un-make Nirn/Mundus. See what Xev said a few posts back. Also, look into the lore about Towers--tl;dr, there are several towers in Tamriel (like the White-Gold Tower, the Throat of the World, Red Mountain, and the Adamantium Tower) which help bind the world together, at least some of which have been "deactivated" over the course of the last few games.

Xevins:

That severely limits the available options unless maybe they try having the next game in Akavir or another continent.

Well, Hammerfell, High Rock, Summerset, and maybe Valenwood could still work.

Black marsh is a horrible move to make if you want new players to join. (albeit kinda cool for those who know the lore)

Black Marsh lore would make it extremely weird for the main character to be anything but Argonian, it'd be pretty lore breaking to be able to walk into the inner parts as say: a Nord or Dunmer. The only place your character would be able to run around in lore-wise would be Imperial outposts on the outskirts of Black Marsh.